Xfree86 from unstable

Hello !
I have tried the XFree86 4.3.0-2 from unstable with my iBook 700. It
works fine until I tried some dual head setup. First, it clones
automagically the display, but the chosen frequency is very low and my
external LCD screen displays a distorted image. The console is then
cloned too, with the same distortion. If I try to get dual head,
either 1024x768 or 1280x1024 with my working setup, I get a yellowish
image.
Michel, do you know the bits from your X server that will make dual
head work ? Is it possible to push them in mainstream XFree (or in the
unstable branch of Debian) ?
Moreover, what is the position of the dri-trunk ? It is versioned
4.3.99. Does this mean that it is more 4.4 than 4.3 ? Or the dri-trunk
branch is not really related to the mainstream branch ?
--
BOFH excuse #17:
fat electrons in the lines